If it becomes chronic or is accompanied by other symptoms, it's crucial to see a doctor to rule out any serious issues.

Medically reviewed by Steven Gans, MD The peripheral nervous system (PNS) is the system of nerves and ganglia outside the ...

A new study reveals that herpes simplex virus-1 (HSV-1), commonly known for causing cold sores, can travel through the nasal ...

The amount of light entering the eye is controlled by a reflex action. The size of the pupil changes in response to bright or dim light. This is controlled by the muscles of the iris.

You look straight ahead and cover one eye, the physician then waves a finger from the side of your head to the middle. The autonomic nervous system controls your body's vital functions ...

But in some cases, the virus can migrate to the eye or nervous system, causing severe, chronic symptoms. A new study in the peer-reviewed journal Human Gene Therapy showed that more than half of ...

The oculomotor system consists of interconnected regions throughout the central nervous system that interact to control various eye movements. It includes different brainstem nuclei, the superior ...

A study from University of Illinois Chicago researchers finds that herpes infection through the nose can lead to anxiety, motor impairment and cognitive issues. The research is the first to show that, ...

The questions in this quiz are suitable for GCSE biology students studying homeostasis, the nervous system, the reflex arc, the brain and the eye. If you struggled with the quiz, don't panic - we ...

The nervous system consists of the central nervous system (brain and spinal cord) and the peripheral nervous system (motor nerves, sensory nerves, cranial and spinal nerves, autonomic ganglia ...